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Why is USB3.0 so fast?
Apr 12, 2018

According to USB3.0 data cable manufacturers, from the perspective of the USB3.0 interface, in addition to the four metal contacts of the USB2.0 interface, five smaller new contacts are added internally. At the same time, in addition to the use of copper as a transmission medium, USB3.0 interface and USB3.0 data lines can also support optical fiber transmission capabilities, optical fiber output speed is obvious to everyone. It is understood that the use of optical fiber connection, USB3.0 speed can reach 20 times or even 30 times USB2.0. Undoubtedly, the ultimate goal of the USB 3.0 standard is not limited to data transmission rates of 4.8 Gbps, but it is hoped that this limit speed will be further exceeded in the future. With the full application of fiber optic cables, USB 3.0 will receive higher transmission speeds. Expanded applications on mainstream products will be further demonstrated. For example, USB high-speed networking or broadcast television program signals can be transmitted on a PC.

USB 3.0 uses a new physical layer, which uses two channels to separate the data transmission and acknowledgment process, thus achieving a data transmission speed of 4.8 Gbps. In order to replace the polling and broadcasting mechanism adopted by USB 2.0, USB 3.0 will adopt a packet routing technology and only allow the terminal device to transmit data when it has to be transmitted. The new linking standard will also allow each component to support multiple data streams, and each data stream can maintain an independent priority. This function can be used to terminate the interference caused by jitter in the video transmission process, and the data stream transmission mechanism. It also makes the inherent instruction queue possible, thus making USB3.0 interface data transmission more optimized.

Final summary: USB 3.0's next-generation interface is ten times faster than current USB 2.0

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